Grinder.



H. G. MCGULLOCH.

GRINDER.

. APPLIOATION FILED 0021.11, 19o?.

Patented Jan. 12, 1909.

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GRINDER. APPLICATION FILED 00T. 11, 1907. 909,31 6. Patented Jan. 12, 1909.

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narran srnrns *Param* carica HARRY GEORGE MCGUIILOGII, .QFV E REEIOIIT, ILLINOIS, .ASSIQNOR TO. THE STOVER MANU- FACTURING COMPANY, OF FREEPORT, ILLINOIS, A CORPORATION OF ILLINOIS.

GRINDER.

Specification of Letters Patent.

Application-ledlOctober 11, 1907.

Patented Jan.- 12, 190e.

serai No. 396,932'.

To" all whom it may concern:

Be it known that I, HARRY GEORGE vision of an adjustable valve between upper' cutting knives and' lower grinding burs, whereby the'feeding of the cut ears to the burs may be readily controlled and regulated.

Another salient characteristic of my invention is the provision of' inclined surfaces on the top ofthe stationary cutter member leading to apertures therethrough located just in front of its cutting edges so' as-to direct the ears of cornto a' positionwhere they may be caught between the sharp edges'of the stationary and rotary cutters 1sind afterwards drop through the holes to the urs.

On the accompanyingl drawings I have illustratedthe preferred and most desirable embodimentof my invention, and on the various views ofthe drawings like reference characters refer to the same parts throughout.

On said drawingse-Figure 1 is a horizontal section through my improved grinder on line 1*-1 of Fig. 2; Fig. 2 is arvertical central section of 'the' grinderon line 2-2 of Fig. 1; Figv 3 isl ahorizontal section on line 3-3 of Fig. 2 Fig. 4 is a fragmentary section illustrating the locking handle for holding the valve plate in adjusted position; Fig. 5 is av perspective view of the stationary cutterA member Fig. 6 lis a similar view of the rotary cutter member; and Fig. 7 is a verticalsection through the stationary cutter on the' curved line 7-7 of Fig.v 1.

Hinged on a suitable base or supportv 10 at 11 is a'main inclosing housing or'casing composed of'two parts 12 and 13`securely bolted together, vthe top portion 13 bearing atits upper end a hopper 14 of substantial sizek and capacity. Mountedf within the' lower portion'of this casing is4 a stationary bur composed'of two parts 15l and 16, the formerflaring or diverging upwardly, while the, latter flares downwardly, as is clearly indicated inl Fig. 2. The part 13 of the casing is suppliedwithl a circular seat 17 on which rests the lower edges of curved flanges 1S extended downwardly from the bottom surface of a roundvstationary cutter member 19'which'is maintained in place on the seat 17 by means of suitable bolts 2() passed through apertures 20L in the member 19 and similar apertures in the seat 17. This member' 19'iscentrally apertured at 21 for the accommodation of a shaft hereinafter described, andhascentrally disposed and extended downwardlyT from'its bottom surface anapertured hub 22a, which also accommodates'the shaft mentioned. On its top face the stationary'outter 19 is supplied with a pair of upstanding'curved cutting edges 22 in front of which andextended through the member are the two apertures 23. The top surface ofA this'member 19 also has the two ortions 24which are inclined downwardly eading to the apertures23, as is clearly indicated in Figsl 5 and 7.

Afina-.in vertical driving shaft 25, rotated by any suitable source of power (not illustra-ted),v is centrally located within the grinder, and has `keyed to itself a supporting cross-bar 26, prevented from downward movenientl'by a transverse pin 27, and on which rests the rotary bur 28 having a conical lower portion 29 and an upper part 3() of substantially uniform dimensions, the hub 22n ofv the stationary cutter 19 extending downwardly within the part 30 of the bur and forming a bearing at 31 on which it may turn. Above the stationary cuttermember 19 and fastened to the driving shaft 25 by a key '32 there is provided a rotary cutter, illustrated in Fig. 6, Vhaving a central apertured. hub 33 and a pair of opposite outwardly-extendedcurved arms 34 with. cuttingedges at 3-5, this rotary cutter being located just above the stationary cutter member y19 so that their sharp cutting edges 22 and 35 may cooperate to cut the ears of corn into parts; A sleeve 36 is mounted on shaft 25* above the rotary cutter and is splined theretoby the key 32, whereby thel rotation of the shaft causes a like rotation of the sleeve, which is equipped with a single radially-extended hook-shaped agitator 37 adapted to stir up or agitate the ears of corn to provide proper feeding of the same to the cutters. 4ltxtended'through the hollow interior of the sleeve 36 there is a shaft or rod 38 having at its lower end a screw-threaded connection at 39 with the top end of the driving shaft 25. An adjusting handle 40 is pinned to the top end of this rod 38 and is supplied with a downwardly-acting springpressed catch 41 adapted to engage in any one of a plurality of notches 42 on the upper end of sleeve 36. By manually turning the handle 40, the shaft 25 and the rotary bur secured thereto may be raised or lowered to bring the rotary and stationary burs closer together' or to permit the movable bur to recede from the stationary one to adjust the iinenes's of the grinding. As is obvious, this adjustment may occur at any time, even though the shaft and sleeve are rotating.

ltotatable in a circular seat 43 on the inner side of casing 13 l provide a round valve plate 44 apertured at 45, the number of apertures corresponding to the number of holes 23 of the stationary cutter member 19, having a pair of spaced ears 46 extended through an arcuate or curved slot 47 in the side of casing 13, and having pivoted between them on a pin 48 supported by they ears. a locking handle 49 weightedat its lower end at 50, and supplied with a portion 51 adapted to engage in any one of a plurality of notches 52 on the outer face of the casing 13. rlhis valve plate has a central hole 53 through which extends the hub 22a of member 19. lt should be noticed that this valve plate is located between the cutters and the burs and just below the apertures 23 of plate 19, and that the holes 45 by the rotation of the valve plate may be brought into and out of register With the holes 23, the plate opening or closing the latter, as occasion demands, to control the feed of the cut corn to the burs.

The operation of this device is substantially as follows: rlhe vertical shaft 25 is rotated by any suitable source of power, and

because of the splined connections therewithv the inner bur, the upper cutter, the sleeve 36, agitator 37 and handle 40 all rotate. rlhe ears of corn are brought between the sharp cutting edges of the stationary and rotary cutters and are directed to such positions that they will be acted upon by these cutters by the inclined surfaces 24 leading to apertures 23. The cut portions of the ears, as soon as they have been severed by the knife edges, drop through the openings 23 andd`45y to the burs, between which they are caught and by which they are ground, the finished product leaving the lower portion of the grinder, as is obvious. The rapidityof feed to the burs maybe readily controlled by adjusting the position of plate-14, the operator iirst lifting the handle 49 so as to free the portion 51 Vthereof from the notches'52. be readily understood that the movement or partial rotation of the valve plate 44 opens or closes the apertures 23 to a greater or less extent, and that upon releasing the handle 49 it, by its own weight, drops'to a vertical position, shown in ldig. 4, the portion 51 thereof fitting in one of the notches 52, there- -by loc-king the valve plate in adjustedV position.

To those skilled in the'art it will be apparent that a considerable number of minor mechanical changes may be made inthe construction described without departure from the spirit `of my invention, since the invention is not limited to the precise structural features shown and described.

l claim: Y

1. ln a device of the character described, the combination of a stationary cutter member having one or more cutting edges and an aperture therethrough adjacent to each` of said cutting edges, a mov ablev cutter withoutting edges cooperating with those oi the stationary member, and an adjustable stationary valve plate directly below said stationary cutter member and adapted to control the passage or passages therethrough, substantially as described.

2. ln a device of the character described, the combinationof an apertured stationary cutter, a cooperating rotary cutter, a stationary bur, a cooperating rotary bur, and an adjustable stationary valve plate between said cutters and burs disposed directly below said stationary cutter and cooperating with the aperture or apertures of said stationary cutter to control the feed of the cut product to the grinding burs, substantially as described.

3. In a device of the character described, the combination of a cutter member having it willV one or more cutting edges, an apertureV edges, an aperture through said member at the front of each of said cutting edges and a downwardly-inclined top surface leading to each of said apertures, a coneratmg horizontal rotary cutter having edges co-acting with those ofthe cutter member, a stationary bur, a cooperating rotary bur, and a horizontal adjustable valve-plate between'said cutters and burs and cooperating With the day of October, A. D., 1907 in the presence aperture or apertures of said stationary cutof tWo Witnesses. ter member to control the feed of the out product to the grinding burs, substantially 5 as described. Witnesses:

As evidence that I claim the foregoing as RAY. S. COOMLIUS, mynvention, l have signed the same this 7th CLARENCE B. MoL'rER.

HARRY GEORGE MCCULLOCH. 

